Term
| Having a high amount of this substance will produce a light colored lava? |
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Definition
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Term
| Name some liquids that have LOW viscosity. |
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Definition
| Milk, vinegar, soda pop, gasoline, lemonade |
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Term
| What would be a good model to use to describe how a volcano erupts? |
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Definition
| Carbon dioxide dissolved in soda pop rushes out when the pop is opened. |
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Term
| Can geologists accurately predict volcanoes? |
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Definition
| Not really - geologists are MORE successful in predicting volcanoes than earthquakes, though. |
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Term
| How do shield volcanoes form? |
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Definition
| They form from many, many thin layers of lava |
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Term
| Describe the life cycle of a volcano. |
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Definition
| active, dormant (sleeping), extinct |
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Term
| True/False? Is an epicenter part of a volcano? |
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Definition
| False - An epicenter is part of an EARTHQUAKE!!!! not a VOLCANO! |
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Term
| List the particles that come from a volcano from smallest to largest. |
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Definition
| gases, ashes, cinders, bombs |
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Term
| What do we call magma once it reaches the surface? |
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Definition
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Term
| What kind of magma causes an EXPLOSIVE eruption? |
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Definition
| Magma that is high in silica! (It is sticky like hot plastic and gets stuck in the vent!) |
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Term
| True/False? Magma rises to the surface because it is less dense than solid rock? |
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Definition
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Term
| True/False? A dike forms when magma hardens between rocks in a horizontal layer. |
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Definition
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Term
| True/False? The activity of a volcano may last from less than a decade to more than 10 million years. |
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Definition
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Term
| True/False? Volcanic eruptions cause damage only when they are close to the crater's rim. |
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Definition
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Term
| True/False? A dome mountain forms when hardened magma is lifted and pushes up horizontal layers of rock. |
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Definition
| True - a dome is similar to a very gentle hill |
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Term
| True/False? When frozen water melts, it is undergoing a physical change. |
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Definition
| True - it is still water, just in a different form. |
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Term
| True/False? A batholith forms when a large amount of lava hardens on the surface. |
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Definition
| False - it is UNDER the surface. |
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Term
| True/False? Magma forms in the lithosphere. |
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Definition
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Term
| True/False? A pipe of a volcano is a horizontal crack in the crust. |
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Definition
| False - it is vertical (up and down) |
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Term
| True/False? A volcano erupts QUIETLY if its magma is thick and sticky. |
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Definition
| FALSE! This would be loud as the magma gums up the pipe and it builds up pressure and explodes. |
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Term
| What is the term for a huge hole left behind when a volcano collapses? |
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Definition
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Term
| What is the term for hot, fast-moving lava? |
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Definition
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Term
| What is the name for cool, slow-moving lava? |
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Definition
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Term
| A substance made of two or more elements that have been chemically combined is called? |
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Definition
| Compound - NaCl is a compound because Sodium (an explosive metal) and Chlorine (a deadly gas) have come together and gotten new properties. |
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Term
| A substance that cannot be broken down into other substances. |
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Definition
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Term
| A long tube that connects a magma chamber to the surface is a? |
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Definition
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Term
| What determines how well a liquid flows? |
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Definition
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Term
| What substance when added to magma makes the magma thicker? |
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Definition
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Term
| This kind of flow happens when an explosive eruption hurls ash, cinders, bombs, and gases out of a volcano. |
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Definition
| pyroclastic - "pyro" means "fire" |
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Term
| This type of volcano is wide, and has gently sloping sides made of hardened layers of low-silica magma. |
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Definition
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Term
| Physical/Chemical property? Ability to burn? |
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Definition
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Term
| Physical/Chemical property? Ability to react with other substances. |
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Definition
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Term
| Physical/Chemical property? Density? |
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Definition
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Term
| Physical/Chemical property? Hardness. |
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Definition
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Term
| Physical/Chemical Property? Magnetic qualities? |
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Definition
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Term
| Physical/Chemical property? Rusting? |
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Definition
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Term
| Name for fine, rocky particles as small as a speck of dust. |
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Definition
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Term
| Term for pebble-sized particles. |
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Definition
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Term
| Term for particles ranging in size from a baseball to the size of a car. |
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Definition
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Term
| Gently sloping mountain formed by repeated LAVA flows. |
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Definition
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Term
| A cone-shaped mountain formed form ash, cinders, and bombs. |
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Definition
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Term
| A mountain formed by lava flows alternating with explosive eruptions. |
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Definition
| Composite Volcano - also called a Strato Volcano |
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Term
| A high, level area formed by repeated lava flows. |
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Definition
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Term
| A hole left by the collapse of a volcanic mountain. |
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Definition
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Term
| Why might people living near a dormant volcano be unaware of the danger involved in living there? |
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Definition
| The volcano may have been "sleeping" for a long time and since it has been a while since it erupted, they have a false sense of security. |
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Term
| What effect can wet, heavy ash cause? |
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Definition
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Term
| Why is ash in the atmosphere dangerous to an airplane? |
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Definition
| The engine can suck in the ash and it can cause it to stall. |
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Term
| When temperature increases, what happens to the viscosity of magma? |
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Definition
| The magma gets runnier because it is hotter. (Think about heating up cold gravy-it gets more runny.) |
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Term
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Definition
| No, the plate that rests over it moves. |
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Term
| What kind of volcanoes are all of the ones on Hawaii? |
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Definition
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